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Negative ion mass spectra of dicarboxylic acids
Author(s) -
Ito Akihiko,
Matsumoto Kozo,
Takeuchi Tsugio
Publication year - 1973
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210071108
Subject(s) - mass spectrum , fumaric acid , ion , dicarboxylic acid , chemistry , phthalic acid , spectral line , maleic acid , polyatomic ion , organic chemistry , physics , polymer , astronomy , copolymer
The negative ion mass spectra of dicarboxylic acids show [M] − ˙ and prominent [M – H] − ions. These ions can therefore be used to determine the molecular weight of dicarboxylic acids which do not give positive molecular ions. The [C 2 H 3 ] − ion is a base peak in the spectra of maleic and fumaric acids. Isomeric phthalic acids are readily differentiated.